Scanning Modes
Vivid S5/Vivid S6 User Manual 167
R2424458-100 Rev. 2
Frequency
Adjusts the transmission frequency in Doppler to control
sensitivity or level of penetration. The selected frequency is
displayed in the status window. Adjusting Frequency may affect
Sample Volume (PW) and LVR settings.
Power
When power is re-
duced, it reduces
the signal-to-noise
ratio, so that the im-
age may become
noisier.
Controls the amount of acoustic power applied in all modes.
When power is set to maximum, it is equal to or less than the
maximum acoustic power permitted by the FDA. The Thermal
Index (TI) and the Mechanical Index (MI) are displayed on the
screen.
Using PW/CW Doppler modes
Controls and opera-
tions for PW and
CW mode are the
same unless other-
wise noted.
There are two ways to start PW/CW Doppler:
Alternative 1
1. Press PW or CW. A scanning screen is displayed with a
Doppler cursor on the 2D mode image and a Doppler
spectrum in the lower part of the screen.
2. Use the trackball to position the Doppler cursor line and in
PW the sample volume location over the area of interest.
Sample Volume ad-
justment may affect
the Scale, Frame
rate and LV rej. set-
tings.
3. In PW, with the Soft menu rocker key, adjust the sample
Volume (SV):
To enlarge the SV, press the Right arrow of the rocker
To narrow the SV, press the Left arrow of the rocker.
Alternative 2
1. Press CURSOR on the control panel. A cursor line is
displayed on the 2D image.
2. With the trackball adjust the position of the cursor line.
3. Press
PW or CW.
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